Trouble accessing Nectar server -- cant update webpages

[avivajpeyi]

Really irritating -- Im getting a permission denied error when trying to ssh into the server! Cant upload the new site because of this :(

[avivajpeyi]

After following https://support.ehelp.edu.au/support/solutions/articles/6000149723-troubleshooting-ssh-access-to-a-nectar-instance, i have still made little progress...

ssh -i ~/.ssh/nectarkey.pem ubuntu@136.186.108.84
ubuntu@136.186.108.84: Permission denied (publickey).

I don't think this error is to do with 1. the wrong key -- I had backed this up in my drive and fingerprints match See this Fingerprint (on Nectar)

56:d5:80:4a:05:1b:8f:bd:a3:6f:63:b7:d7:97:3a:b9

Key Fingerprint (on local)

ssh-keygen -E md5 -lf ~/.ssh/nectarkey.pem 2048 MD5:56:d5:80:4a:05:1b:8f:bd:a3:6f:63:b7:d7:97:3a:b9 no comment (RSA)

These match! Woohoo!

2. the username ('ubuntu') -- I am pretty sure this is standard? --THIS IS WHAT WAS WRONG: the username is 'ec2-user' as im on CentOS

3. the IP: 136.186.108.96, I checked this on the nectar instance page

[avivajpeyi]

OMG I was using the wrong username -- ssh -i ~/.ssh/nectarkey.pem ec2-user@136.186.108.96

[avivajpeyi]

Trying to re-deploy the pages:

$ sudo yum update httpd
CentOS Linux 8 - AppStream                      6.3  B/s |  38  B     00:06
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

From StackOverflow:

sudo sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sudo sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
sudo yum update -y

the above seems to work! Still need to finish setting up Apache https://www.digitalocean.com/community/tutorials/how-to-install-the-apache-web-server-on-centos-7

[avivajpeyi]

Setting up Apache

sudo yum install rsync
sudo yum remove httpd
sudo yum install httpd
vi /etc/httpd/conf.d/server-status.conf

Contents of /etc/httpd/conf.d/server-status.conf

<Location "/server-status">
    SetHandler server-status
    #Require  host  localhost       #uncomment to only allow requests from localhost 
</Location>

 vi /var/www/html/index.html 

contents of /var/www/html/index.html

hello world

sudo systemctl restart httpd
sudo yum install links
apachectl status

● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disab>
   Active: active (running) since Tue 2022-06-14 15:14:35 UTC; 34s ago
     Docs: man:httpd.service(8)
 Main PID: 23761 (httpd)
   Status: "Running, listening on: port 80"
    Tasks: 213 (limit: 49501)
   Memory: 38.5M
   CGroup: /system.slice/httpd.service
           ├─23761 /usr/sbin/httpd -DFOREGROUND
           ├─23762 /usr/sbin/httpd -DFOREGROUND
           ├─23763 /usr/sbin/httpd -DFOREGROUND
           ├─23764 /usr/sbin/httpd -DFOREGROUND
           └─23765 /usr/sbin/httpd -DFOREGROUND

[avivajpeyi]

The VM on its own doenst have much memory -- 20GB. The volumes are where most of the files should be stored. https://tutorials.rc.nectar.org.au/volume-storage/04-format-mount

the atlas_vm has a volume mounted at /mnt/storage/. This is where the TESS Atlas should be stored

sudo scp avajpeyi@ozstar.swin.edu.au:/fred/oz200/avajpeyi/projects/atlas_runs/*.tar.gz /mnt/storage/pages.tar.gz

[avivajpeyi]

The website is being served from the dir /var/www/. This dir does not have a large storage space. I need to set up a symlink to the pages stored in /mnt/storage/pages/

[avivajpeyi]

To serve the pages from a different directory, need to adjust the root-directory in the httpd.conf:

vim /etc/httpd/conf/httpd.conf

to

and restart apache! systemctl restart httpd

[avivajpeyi]

Tut on accessing volumes https://supercomputing.swin.edu.au/rcdocs/volumes/